Lock-casing.



UNITED STATES PATENT OFFICE.

LEVIN I-I. MULLIKIN, OF TRAIIE, MARYLAND, ASSIGNOR TO l?. da F, CORBIN AND RUSSELL d' ERWIN MANUFACTURING COMPANY, BOTH OF NEW BRITAIN, CONNECTICUT, COR- PORATIONS OF CONNECTICUT.

LOCK-CASING.

Specification of Letters Patent.

Patented Oct, 15, 1907.

Application tiled amber 12, 1906, Serial No. 338,573. Renewed July 23,1907. Serial No. 385.140.

To all whom it may conccm:

Be it known that I, LnvrN H. MULLIKIN, a citizen oi the United States, residing at Trappe, in the county oi Talbot and State of Maryland, have invented new and useful Improvements in Lock-Casings, of which the iollowing is a specification.

My invention relates to that class of lock cases which are provided with a l'ace plate adjustable lor doors of varying thickness.

The object oi the invention is to provide a lock case 'with a l'ace platewhich may be adjusted with respect to the lock case, to fit doors otvarying thickness without having to cut ot'f any part olthe case to make a tit and without leaving any of the wood Work exposed at the point oi adjustment. This object I accomplish by the construction shown in the accompanying drawing in which- Figures l, 2 and 3 are end views showing my improved lock case applied to three doors oi different thickness. Fig. 4 is a section on line 4-4 of Fig. l; and Fig. 5 is a fragmentary perspective of the two parts o the casing separated.

A, designates a lock case adapted to be set into a recess in the edge or' a door B, as shown in Figs. 1,2 and 3 with its front end flush with the edge of the door and its sides flush with the sides of the door. One side oi the lock case is formed or provided with a face plate A/ while the opposite side ot' the casing at its front is ormed with an extension A2 in the plane of the iront oi the casing. This extension is preferably in the form of parallel plates a, a, spaced apart to form a vertical groove a2, into which lits, slidingly, the laterally projecting extension, plate or rib, a3, formed just inside the iront edge of the adjustable-lace plate A3. The upper and lower ends oi the plate or rib a3, are provided with horizontal members a, a4, which overlap the upper and lower edges, respectively, of the plate or rib a, and extend flush with the iront edge of the lace plate A3.

Fig. l, shows the door o least thickness for which the improved casing is adapted, Fig. 2 shows it applied to the next and Fig. 3 shows it applied to the door of greatest thickness for which it is adapted.

The overlapping plates or ribs a, a3, slide one on the other and cover the joint very neatly while the plate a, prevents longitudinal sliding movement and the horizontal members a4, prevent vertical movement of the adjustable face plate A3 with respect to the other parts oi the casing.

What I claim is:

A lock casing, provided at one side of its front edge with a pair of parallel vertical spaced plates or ribs and an adjustable face plate having a vertical plate or rib near its front edge slidingl in the groove formed between the said first two plates or ribs, and horizontal members extending forwardly troni the ends of said sliding plate or rib and overlying the ends of the front one of the said pair of plates or ribs.

In testimony whereof I ax my signature, in presence of two subscribing Witnesses,

LEVIN H. MULLIKIN. 

